The start potentiometer sets the initial voltage to 200V when adjusted halfway. The soft start potentiometer has a maximum duration of 30 seconds, corresponding to the full 380V output. Example: When all settings are at minimum, starting voltage is 0V with 0 seconds soft start time (0 seconds not recommended). For 220V power supply, adjusted halfway: starting voltage is 55V, soft start time approximately 22 seconds. For 380V power supply, adjusted halfway: starting voltage is 95V, soft start time approximately 22 seconds. For 220V power supply, fully adjusted to maximum: starting voltage ranges from 110V to 220V, soft start time approximately 15 seconds. For 380V power supply, fully adjusted to maximum: starting voltage ranges from 190V to 380V, soft start time 15 seconds. General recommendation for selection margin: SSR-60WA-R for 2.2kW applications. This product is commonly used for motors operating at the following voltages: 220V (50Hz, 60Hz) 230V (50Hz, 60Hz) 240V (50Hz, 60Hz) These three voltages are supported by this product. Single-phase 220V soft start module application fields: Petroleum, chemical, fire protection, construction, metallurgy, building materials, mining, environmental protection, and other industrial areas. Suitable for fans, pumps, belt conveyors, ball mills, car wash machines, conveyors, and compressors. It serves as an ideal replacement for traditional reduced-voltage starting methods such as star/delta starters, auto-transformers, magnetic controllers, and inverters. 220V single-phase motor soft start module (motor control method) models: SSR-20WA-R1 (1kW) SSR-40WA-R1 (1.5kW) SSR-60WA-R1 (2kW) SSR-100WA-R1 (4kW) SSR-150WA-R1 (6kW) SSR-200WA-R1 (8kW) Sizing guideline: Select based on actual working current multiplied by 5: Power ÷ Voltage × 5 Example: For an 8000W motor: 8000W ÷ 220V × 5 = 181.81A → Choose 200WA model (nearest available). The soft start module is compatible with various motors, regardless of capacitor use. Motors above 2000W require a heatsink if operating under continuous duty. Voltage compatibility: (220V + 0V) – Single-phase 220V AC (230V + 0V) – Single-phase 230V AC (240V + 0V) – Single-phase 240V AC (220V + 220V) – Two-phase 380V–400V AC Frequency range: 50Hz or 60Hz Soft start time is adjustable from 0 to 30 seconds, covering the full ramp-up from 0V to 220V or 0V to 380V. The starting voltage gradually increases from 0V to 50% of rated voltage before reaching full voltage (220V or 380V). Two operational modes: 1. Close the switch to energize main power and initiate soft start. 2. Use switch to control operation: close to start, open to stop. Soft start module variants: 1. SSR-40WA-R1 includes soft start function only (no soft stop). 2. SSR-40WA-R2 includes both soft start and soft stop functions. Notes: Do not apply voltage directly to the switch terminals. Do not use a multimeter on the load side to assess product functionality. Performance subject to field testing. Operating temperature range: -25°C to 60°C